You start your shift as a cashier with your drawer containing ten $1 bills, 5 $2 bills, three $5 bills, one $10 bill and one $100 bill. Find the expectation if one bill is selected.

Answer 1

(1*1 + 5*2 + 3*5 + 1*10 + 1*100)
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(1+5+3+1+1)

Answer 2

10.23